Also I found that less AF fine adjust was required. On k5, all my lenses ( mostly pentax limiteds and *) needed some AF adjust. On the k3 some didn't need any, and the ones that did needed much lower correction numbers.

Offhand, I can't think of anything that is worse than the k5. Some people may say noise at high ISO is worse, but real world performance, ie when printing or resizing output to the same resolution I don't believe there is any significant difference.